Iieinrich meltzer



No. 608,470. Patented Aug. 2, I898.

' H. MELTZER.

MACHINE FOB WORKING BALLS.

(Application filed Apr. 8. 1897.)

(lo Iodal.)

IN VE N T05:

WITNfSSES.

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UNITED STAT S} PATENT @rricn.

HEINRICH MELTZER, OF RATIBOR, GERMANY.

MACHINE FOR WORKING BALLS.

SPECIFICATION forming part of letters Patent No. 608,470, dated August2, 1898. Application filed April 8,1897. Serial No. 631 ,228. (Nomodel.)

To all whom it may concern.-

Be it known that I, HEINRICHMELTZER, a subject of the King of Prussia,Emperor of Germany, residing at Ratibor, in the King-I and usefulImprovements in Machines for Working Balls, of which'the following is aspecification.

For working the ro u ghly-prepared balls the latter were kept hithertoin circular grooves, and in describing always the same circular linethey were worked either upon. a flat grindin g-disk or this working waseffectuated by the walls of the guide-grooves provided with fine teeth,(file cut,) or in such a manner that the balls were ground between thesmooth walls of the groove, say, in oil and emery. The rule was that thedisks grooved themselves or the disks inclosing the grooved guide-plateswere moved in opposite directions, and it was necessary that the groovescorresponded to the size of the ball.

Reference is to be had to the accompanying drawings, forming a part ofthis specification,

in which similar characters of reference indi cate corresponding partsin boththe figures.

Figure 1 is a side elevation ofthe machine, partly in section; and Fig.2 is a plan view of a hereinafter-described detail.

In my new machine for working balls (shown in side elevation, partiallyin section, in the accompanying drawings) the standard A carries themovable bowl 0, playing with its hardened and ground steel trunnion D,the lower end of which is hemispherically-shaped, in thecorrespondi'ngly-hollowed steel support B, the circular movement of thesaid bowl 0 being limited by its tappets E E and by the tappets F F ofthe standard-plate. Into the hollow space of the bowl 0 descends thestamp J until their surfaces, sloping both at an angle of forty-fivedegrees, are approached toward each other nearly entirely or to such anextent that large or small balls may be worked by the same machine. Whenthe stamp is raised, the balls to be worked are introduced into theintermediate space formed, and a bottom plate 1-1, the thickness ofwhich varies according to the size of the balls, or a ring prevents theballs from entering between the horizontal bottom surfaces of the balls.

' bowl 0 and the stamp J. There is left, however, under allcircumstances air between the stamp J and the plate H, so that anyfriction between these parts is quite excluded. dom of Prussia, Germany,have invented new I pressure it is weighted by means of weights M M Mwhich may be exchangeable, and it canbe raised by means of the lever N,the handle of which is supported on the point 0 of the :standard A. Thespindle K is actuated by means of the pulley P, secured tothespindle-box L. The descent of the spindle is limited by a nut R, thecircumference of which is divided, say, into one hundred parts, so thatthe intended reduction of the diameter of the balls to be worked canexactly be determined up to the exactness of a one 011ehundredthmillimeter by adjusting the nut R with respect to the pointer S afterthe stamp has been lowered upon thenon-worked The adjustingmutR issupported in its lowest position by the'projecting upper edge of therevolving spindle-box L.

The balls introduced into the machine are rapidly distributed uniformlyaround the revolving stamp J, and it is not necessary to place them, asformerly, in a circumferential manner into the grooves, and toward twosides they have a free play between the large working surfaces of O andJ, so that not only one single row,.but-several rows of balls are workedsimultaneously.

By this machine an exact spherical form and other advantageous resultsare obtained, owing to the following circumstances: first, thehorizontally-acting rotary motion of the stamp; second, theverticallyacting load of the spindle; third, the difference in thelength of the path of the ball running between the working surfaces ofunequal circumference, which difference produces the milling rotarymotion of the ball; fourth, the centrifugal force propelling the ballsin the oblique clefts outward until they touch the ring T, pushed overthe stamp J; fifth, the friction of the balls againsteach other, whichis of the greatest importance in particular for the milling effect;sixth, the multiplying of the variety of these effects by means of twocams U and V, the latter being carried by a common shaft 7, by whichalso more machines may be actuated, and the cam U being arranged on thelever-arm N, by means of which cams the working spindle and with it thestamp J are raised from time to time, so that the risen balls fallalways back again for recommeneing their circular motion, the speed ofthe balls continuously increasing when between the bowl 0 and the stampsJ they move upward. Finally, it may still be remarked that theunevennesses of the oblique working surfaces produced by wearing, &c.,are compensated as much as possible by the permanentclose-clinging ofthe bowl freely playing in its hemispherical bearing.

The balls are milled or worked between the parts 0 and J. The parts 0and J having roughened surfaces mill the balls and by this operationproduce the desired effect.

I claim- 1. The combination of a bowl, astamp revoluble therein, anaxially-movable spindle to which the stamp is attached, a lever inconnection with the spindle, and a cam coacting with the lever.

B. The combination with a frame, of abowl, astamp coactingtherewith,aspindleattaehed to the stamp, the spindle being slidable andrevoluble, a lever in connection with the spindle, a cam engaging thelever, and an arm pivoted to the lever and capable of holding the leverraised out of engagement with the cam.

3. The combination of a bowl, a stamp coacting therewith, continuouslyoperative means for continuously revolving the stamp within the bowl andcontinuously-operative means for periodically lifting and dropping thestamp.

4. The combination with a frame, of a bowl capable of partial revolutionon a Vertical axis, and a revoluble stamp coacting with the bowl to workballs between the two.

5. The combination of a bowl, a stamp revoluble within the bowl, thestamp and bowl being arranged to receive balls between their adjacentfaces, and aring capable of bearing down 011 the balls to prevent theexpulsion of the balls from the bowl.

6. The combination of a bowl having outwardly-fiarin g walls, arevolublc stamp working in the bowl and conforming therewith wherebyballs received between the stamp and bowl will be thrown upward andoutward, and a ring capable of bearing down on the balls to hold them inplace.

7. The combination of a bowl, a continuously-revoluble stamp workingtherein, a continuously-reveluble shaft, and means including a cam, suchmeans being driven by the shaft and serving periodically to lift anddrop the stamp toward and from the bowl.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

HEINRICH M E LTZER.

\Vitnesses:

EDUARD Pnrrz, G. IIULSMANN.

